Constraints ImposedTo maintain the original appearance of a Model A engine and the interchangeability of parts, the following three constraints have been imposed on this engineering study and redesign. These constraints are: The external appearance of the engine cannot change from the appearance of a completely stock Model A engine. All internal and external interfaces where mating parts attach cannot change from the interfaces on a completely stock Model A engine.

All basic engine dimensions cannot change and must remain equivalent to the dimensions found in a stock Model A engine.

In other words, an engine assembled with the four redesigned parts of this engineering study with all other parts stock will have an exterior appearance identical to a Model A engine but have the life and reliability approaching that of a modern engine. If you haven’t guessed it by now, the four parts that have been redesigned in this engineering study are the crankshaft (A-6303), connecting rod (A-6200), cylinder block (A-6015), and oil pump drive bearing (A-6560).